Feed mechanism for tool-supports for lathes



Patented Aug. 31, 1926.

havin Toor:` corrieri/fin l Application led'iune 7, 1919, Serial No. 3025494 My invention relates to lathes and more particularly to lathes of the Lj'eneral type illustrated in my copendingapplication, rial No. 212,398, `iled January 18,1918,hav inea. double bed and two tool carriages.

@ne object of my invention is to provide an inexpensive and simple transmission for the operation ofthe tool on the rear tooly carriage of said lathe.

Another object is. to-provide for ready adjustment of the transmission to secure diiferent speed ratios betweenxthe movement of the front tool carriapgezand the rear tool carriage.

Still another object is to provide for pesitive actuation of said rear toolin either direction by power.

il; special objectis to arrange for the simultaneous actuation ofboth ltools eitherby power or by hand.`

Further objects and advantages of iny invention will become apparent as the description proceed 1n the accompanyinn` drawings, ll 1 is an end view of a lathe illust 1atino an einbodin'xent of my invention, the tail stoel; being omitted. 2 is a rear view of the e and associated parte.

rear tool czfirria`l Fig. 3 is a fragmentary front view showing connecti for actuatinig the front drive shaft.

ln the drawings, designates a lathe bed havingl a frontset of ways 11 and 12 and a rear set 13 and 14. fr tool carriage 15 isv slidably mounted on the front ways and carries the usual transverse slide 1G operated by the handle 17. il denotes a tool carried by the front carriage 15. The carriage 15 may be connected in any Awell known manner to be fed by power or by the hand wheel 18. l have illustrated a drive shaft 18D- operatively associated with a projection 15T ee Fig. 3) depending` from the carriage 15 ana adapted to be rotated by power or by the hand wheel 18 and by its rotation to actuate the carriage. y1`he rear tool carriage is longitudinally slidable uponA the rear ways 13 and 14 and may be clamped in adjusted position thereon by any suitable means such as a clamping plate 19 and bolts 20. Guideways 21 are formed at the top of the rear tool carriage 22 and guide and support a transverse slide 23 having the usual T- Renewed January, 18, 1926.

slot for the mounting of a cutting` tool B.

Means are` provided :for feeding the rear tool ltoward vand'away from theA center line of the lathe at airatewofl'speed bearing any desiredratio to themoivement of Vthefront tool 'carriage-15. A' rack 24`projectingfrom the under surface of the transversefslide engages a pinion 25- at the upper end ofavertical shaft 26 suitably journaled at 27 and 28l in the metal ofthe rear toolcarriage. A bevel gear 29 is mounted on the lower end ofthefshaftand receives power from a simi-l lar bevel ,gear 30 4rotatably mounted in adepending' bracket 314011 the rear tooly carriage and splinedon the drive shaft 32.' Power is transmitted to the rear' drive shaft 32 from' the pinion 33 mounted on the end ofthe drive shaftlSVfor the frontcarriage through agear 34meshin'g ,with said 'pinion and' a secoirtl`-geir"'rotting'with the first* 2gear and meshingwith a gear 36 on the rear drive shaft 32. The two intermediate gears 34 and 85 are mounted on a bolt 37 slidablc in a slot 38 in a suitable arm 39 pivoted for rotation around the axis of the front drive shaft 18a and adapted to be clamped in adjusted position by a suitable screw 40 engaging lugs 41 on the split collar 42, carrying` said arm 39. It will be seen that the four gears shown can be quickly and easily interchanged or removed and replaced by other 2gears to secure any desired ratio between the speed of the front tool carriage and the rear tool carriage, and that the rear tool may be positively driven in either direction.

In Fig. 3 l have illustrated one typical exan'iple of means for actuating the front drive shaft 18a either by power or by hand. Peferring to this ligure, it will be seen that the shaft 43 projects beyond the end of the lathe bed and carries a gear 44 adapted to be driven in either direction by power from any suitable source such for instance as that shown anddescribed in my copending application, Serial No. 212,893 filed January 18, 1918. A clutch 45 controlled by a lever 46 is adapted to connect the projecting shaft 43 with the shaft 18EL for driving the same by power. Keyed on the shaft 18L is a bevel gear 47 engaging another bevel 48 adapted to be rotated by the hand wheel 18. It will be seen that with the clutch 45 disconnected, the lshaft 18a may be manually operated at any time and that by means of theI clutch power' may be used to rotate the shaft.

'lhetransmission I have disclosed is made up of relatively few parts of standard design, and is cheap to manufacture, easy to assemble, and serviceable vin operation.

W'hile I have shown and described a particular embodiment of my invention I desire the description to be considered as illustrative onlyand aim in the subjoined claims to cover all such legitimate modifications and improvements thereof as would naturally occur to a person skilled in the art, such, for instance, as the ysubstitution of a worm and worm wheel for any of the intermeshing gearsshown, or the addition of a wormrandV worm wheel at any convenient point for fur-` 'ther speed reduction.

Iclaim as my invention l. A lathe having', in combination, a front tool carriage,a front drive shaft for feeding the front tool carriage,` a rear tool, a power connection from said front drive shaft to said rear tool, and means for actuating said front' drive. shaft either manually or by power. n

A lathe having,.in combination, a double bed, a tool carriage on the front portion of said bed, a rear tool mounted on thel rear portion of saidbed and means adapted to be V1,598,171 ,i M i actuated either manually or by power for control of said front carriage and said rear tool.

3. A lathe having, in combination, a double bed, a front tool and a rear tool carried by said double bed, a drive shaft for feeding said front tool, a power connection between said drive shaft and said rear tool for feeding the latter, and means for Aactuating' said drive shaft manually or by power.

el.. A lathe having, in combination, a double bed, a front tool and a rear tool, means for actuating said tools simultaneously by power, and manual means mounted on said lathe bed for simultaneous actuation of said tools.

5. A lathe having in combination, a kdouble bed, a front tool and a rear tool on said bed, a longitudinal drive shaft adapted to be driven b y power and to actuate both said tools, and a means mounted on said bed for manually driving said shaft. n

6. A lathe having, in combination, a front carriage and an independently mounted rear tool, a single transmission adapted to actuate said carriage and tool, and means for actuating said transmission either manually or by power.

In testimony whereof, I have hereunto set my hand.

GUSTAF DAVID SUNDSTRAND. 

